Why is the constellation so accurate?

Barnum effect means that people usually regard some vague and ambiguous personality characteristics as their own personality characteristics, and they also feel that they are described very accurately.

For example, some viewpoints are described as follows: a constellation is earnest, practical, approachable and sincere to friends, but sometimes it is not rewarded and will be betrayed by friends.

Or a certain constellation is cheerful and optimistic, with a smile on his face, but he will show sadness when he is alone. This is because he doesn't want his relatives and friends to worry about himself, so he tries to pretend to smile in front of everyone, and so on. If I don't announce which constellation this sentence describes, will you think it's you?

This is the mechanism of Barnum effect, which means that a group of people have the characteristics that some people have, and everyone can agree with them.

The origin of the constellation:

Mesopotamian astrologers divided the starry sky into several regions for the convenience of studying and observing many stars in the sky, and each region was a constellation. It's hard to say clearly when humans began to have the concept of constellation. This astronomical knowledge was known long before there was a historical record.